1011121121 has 24 divisors (see below), whose sum is σ = 1102901184. Its totient is φ = 926432000.

The previous prime is 1011121117. The next prime is 1011121123. The reversal of 1011121121 is 1211211101.

It is not a de Polignac number, because 1011121121 - 2² = 1011121117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011121123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3844436 + ... + 3844698.

It is an arithmetic number, because the mean of its divisors is an integer number (45954216).

Almost surely, 2^1011121121 is an apocalyptic number.

It is an amenable number.

1011121121 is a deficient number, since it is larger than the sum of its proper divisors (91780063).

1011121121 is a wasteful number, since it uses less digits than its factorization.

1011121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601 (or 584 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1011121121 is about 31798.1307783964. The cubic root of 1011121121 is about 1003.6933824654.

Adding to 1011121121 its reverse (1211211101), we get a palindrome (2222332222).

The spelling of 1011121121 in words is "one billion, eleven million, one hundred twenty-one thousand, one hundred twenty-one".